affleck



J. S. AFIE'LECK. `Packing Ring for Boiler Tubes.

WITNESSES INVENTOR:

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UNITED STATES lPATENT OFFICE.

JOHN S. AFFLECK, OF BROOKLYN, (GREEN POINT STATION,) NEW YORK.

PACKING-RING FOR BOILER-TUBES.

sPEcIFrcAmroNforming parc of Letters Patent No. 229,070, dated June 22, 1880. Application led December 26, 1879.

To all whom 'it may concern: V

Be it known that I, JOHN-S. AFFLECK, of Brooklyn, (Green Point Station,) in the county of Kings and' State of New York, have invented a new and useful Improvement in Metallic Packing-Rings for the Joints of Tubular Boilers, of which the following is a specification.

Figure l is a sectional view of the improvement shown as applied to a tube-connection. Fig. 2 is a side view of one of the packingrings. Fig. 3 is a cross-section taken through the line x Fig. 2.

Similar letters of reference indicate correspondin g parts.

The object of this invention is to furnish packing-rings so constructed that they Will adj ust themselves to any imperfections in their seats, and will melt should the boiler become i unduly heated.

I will describe the improvement as applied to the tube-connections of a Roots tubular boiler7 but do not wish to limit myself to that application, as my improvement may be used with advantage. in various other places.

A represents a boiler-tube connection, the rims B of which are connected with apertures in the boiler end plates, attached to the ends of the tubes. .Around the rim B is formed a ange or shoulder, C, the face of which is grooved or recessed to receive the packingring.

D is the body of the packing-ring, which is interposed between the recessed shoulder C and a corresponding recess in the end plate. The packing-ring D is made of a soft metal, and has V-shaped lips E formed upon its opposite sides. With this construction, when the connection A is secured in place, the ribs E, being made thin,- will yield to any roughness in the seats, and will be pressed into any depressions in the said seats, so as to make a close joint.

With this packing, should the water get low in the boiler and the boiler become unduly heated, the packing-rings will melt and allow steam to. escape and give warning before the overheating has reached a dangerous point.

I am aware that soft metal has been heretofore used in packing-rings; but

What I claim as new and of my invention is- A soft-metal packing-ring having a body, D, provided with a lip, E, on each side, in combination With a boiler-tube connection having a rim, B, with the grooved an ge G, as and for the purpose specied.

JOHN S. AFFLECK.

Witnesses:

. HENRY M. RIGKETT,

LEWIS H. Ross. 

